Theodore M. Present
California Institute of Technology, Pasadena, CA
Activity
2024
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MAGNECRETES: FORMATION AND ALTERATION OF MAGNESIUM CARBONATES IN GROUNDWATER AND REGOLITH IN CENTRAL QUEENSLAND, AUSTRALIA, AND PROCESSES RELEVANT TO MARTIAN CARBONATE DEPOSITS
T262 Alkaline Lakes on Earth and Beyond: Mineralogy, Geochemistry, and Habitability (Posters)Wednesday, 25 September 20248:00 AM - 5:30 PMHall D
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NEAR-SURFACE AQUEOUS CONDITIONS INFERRED FROM THE COMPOSITION OF MAGNESITES FROM CENTRAL QUEENSLAND, AUSTRALIA: A JEZERO CRATER ANALOG
T262 Alkaline Lakes on Earth and Beyond: Mineralogy, Geochemistry, and Habitability (Posters)Wednesday, 25 September 20248:00 AM - 5:30 PMHall D
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QUANTITATIVE ANALYSIS OF STROMATOLITE MORPHOMETRICS, PALEOPROTEROZOIC ROCKNEST FORMATION, CANADA
T32 New Voices in Geobiology (Posters)Sunday, 22 September 20248:00 AM - 5:30 PMHall D
2023
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PRIMARY MICROFOSSILIFEROUS CHERT IN THE APTIAN BARRA VELHA FORMATION
T155 New Voices in GeobiologyTuesday, 17 October 20238:00 AM - 12:00 PM335
2022
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A DATABASE APPROACH TO INVESTIGATING DEPOSITIONAL CONTROLS ON SULFUR AND CARBON ISOTOPE RECORDS
T125 New Voices in Geobiology (Posters)Monday, 10 October 20222:00 PM - 6:00 PMExhibit Hall F
2021
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FIELD, PETROLOGIC AND GEOCHEMICAL EVIDENCE FOR UPPER-CRUSTAL ULTRAMAFIC CUMULATE FRACTIONATION TO GENERATE INTERMEDIATE PLUTONS AT EMIGRANT GAP, SIERRA NEVADA, CALIFORNIA
T203 The Life and Times of Arc Volcanoes from Bottom to Top IWednesday, 13 October 20218:00 AM - 12:00 PMA106
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NEW CLUMPED ISOTOPE CONSTRAINTS ON THE TEMPO AND MAGNITUDE OF HIRNANTIAN (LATE ORDOVICIAN) GLACIATION FROM ANTICOSTI ISLAND, QUÉBEC, CANADA
T10 New Perspectives on Phanerozoic Mass Extinctions and Environmental Perturbations ISunday, 10 October 20218:00 AM - 12:00 PME143/E144
2020
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CARBON ISOTOPE SIGNATURES IN MICROBIAL MAT CARBONATES – HOW DO DIFFERENT CARBONATE COMPONENTS RECORD INFORMATION ABOUT LOCAL VERSUS GLOBAL CARBON CYCLING?
T81 Deep-Time Carbon Cycles, Redox Changes, and the Evolution of the Biosphere ITuesday, 27 October 20201:30 PM - 5:30 PMMeeting Rooms
2018
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A SEQUENCE-STRATIGRAPHIC FRAMEWORK FOR THE ZEBRA NAPPE, SOUTHERN NAUKLUFT MOUNTAINS, NAMIBIA
T44 Mixed Siliciclastic-Carbonate Depositional SystemsSunday, 4 November 20188:00 AM - 12:00 PMRoom 235
2017
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STRUCTURAL MAP OF THE SOUTHERN NAUKLUFT MOUNTAINS, NAMIBIA
T287 Best Student Geologic Map Competition (Posters)Tuesday, 24 October 20179:00 AM - 6:30 PMHalls 4EF
2014
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SULFUR ISOTOPE SYSTEMATICS OF MESOPROTEROZOIC HYDROTHERMAL PYRITE TUBES, BLACK BUTTE DEPOSIT, MEAGHER COUNTY, MONTANA
20 Precambrian II: Meso- and Neoproterozoic Evolution of Western Laurentia: In Honor of Don Winston (Posters)Tuesday, 20 May 20148:00 AM - 5:00 PMBallroom B, C, D
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MICRO-CT ANALYSIS OF ANOMALOUS TUBE STRUCTURES FROM THE MESOPROTEROZOIC NEWLAND FORMATION, MEAGHER COUNTY, MONTANA
22 Precambrian II: Meso- and Neoproterozoic Evolution of Western Laurentia I: In Honor of Don WinstonTuesday, 20 May 20141:00 PM - 5:00 PMGaines Hall 101